the rock archway at tennessee cove came crashing down 10 days ago likely the result of time, geological forces and the latest round of winter rains. >> we always have to blame the weather man. just not fair. >> when in doubt when scratching for something, hold on to blaming the weather -- part of the job >> i don't know. >> comes with the territory. blame the weather man later this week for the cold weather and the bad air quality tomorrow. peek outside concord chilly, livermore, you hit 62 santa rosa. warm spots oakland and san francisco. radars clear. high-def doppler showing zero pro sippation. liver more, fairfield down to -- precipitation. livermore, fairfield down to 5. dense fog advisory in effect. plan on a lot of fog again for that morning commute until 9:00 a.m., east bay, south bay, inland valley, leave a couple minutes early coming up tomorrow. we will soon be directly under a big area of high pressure that causes all the pollutants to get trapped in the lowest level of the atmosphere that is why air quality will not be good. highs 60s tomorrow will be the mildest day of the